Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 10: Poster Session: Superconductivity
TT 10.54: Poster
Montag, 14. März 2011, 14:00–18:00, P4
FFLO like State in Bilayers and Trilayers of Superconductors and Ferromagnets: The Spin-Valve Core Structure — •Vladimir Zdravkov1,2, Jan Kehrle1, Günter Obermeier1, Aladin Ulrich1, Claus Müller1, Roman Morari2, Anatolie Sidorenko2, Lenar Tagirov3, Reinhard Tidecks1, and Siegfried Horn1 — 1Institut für Physik, Universität Augsburg, D-86159 Augsburg, Germany — 2Institute of Electronic Engineering and Nanotechnologies ASM, MD 2028 Kishiniev, Moldova — 3Solid State Physics Department, Kazan State University, 420008 Kazan, Russia
Critical temperature oscillations and reentrant superconductivity has been observed in thin film bilayers and trilayers made of Nb as superconducting (S) and Cu41Ni59 as ferromagnetic (F) metal, for increasing F-layer thickness. This effect is caused by the establishing of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) like state in these geometries, leading to interference effects of the superconducting pairing wave function. While in our former investigations S/F bilayers were investigated [1], we here report on F/S bilayers where the S-metal now is grown on top of the F-metal, and the combination of both building blocks to a F/S/F trilayer, i.e. the core structure of the superconducting spin valve [2].
V. I. Zdravkov, J. Kehrle, G. Obermeier, et al. Phys. Rev. B 82, 054517 (2010)
L. R. Tagirov, Phys. Rev. Lett. 83, 2058 (1999)